Games like NIGHTSTAR
Games like NIGHTSTAR include EVERSPACE™, Elite Dangerous, HELLDIVERS™ 2, House of the Dying Sun, and STAR WARS™ Battlefront II (Classic, 2005). We matched them by the tags players give NIGHTSTAR on Steam (Action, Indie, Space, Sci-fi, and Shooter): closest matches first, and among equally close ones the better-known games.

EVERSPACE™
Shared: Action · Space · Indie

Elite Dangerous
Shared: Space · Space Sim · Sci-fi

HELLDIVERS™ 2
Shared: Action · Shooter · Sci-fi

House of the Dying Sun
Shared: Action · Indie · Space

STAR WARS™ Battlefront II (Classic, 2005)
Shared: Action · Shooter · Sci-fi

STAR WARS™ Battlefront™ II
Shared: Space · Shooter · Action

STAR WARS™: Squadrons
Shared: VR · Space · Action

Chorus
Shared: Action · Indie · Space

Project Wingman
Shared: Action · Indie · VR

Dead Space (2008)
Shared: Action · Sci-fi · Space

The Callisto Protocol™
Shared: Sci-fi · Space · Shooter

Deliver Us The Moon
Shared: Indie · Action · Space

Hard Bullet
Shared: Action · VR · Indie

Angels Fall First
Shared: Action · Indie · Sci-fi

Dead Space
Shared: Space · Sci-fi · Shooter

Dead Space™ 2
Shared: Action · Shooter · Sci-fi

Space Pirate Trainer
Shared: Action · VR · Space

Rebel Galaxy
Shared: Space · Sci-fi · Action

Mass Effect (2007)
Shared: Action · Sci-fi · Space

Kinetic Void
Shared: Indie · Action · Space

BONEWORKS
Shared: Action · VR · Shooter

Warframe
Shared: Action · Third Person · Third-Person Shooter

Strike Suit Infinity
Shared: Action · Indie · Space

Warhammer 40,000: Space Marine 2
Shared: Action · Sci-fi · Third Person